Water/ground source heat Pumps are available in open and closed versions.
Open system: A heat pump system that uses water directly for heat transfer. The system needs to be equipped with sand blocking, anti-fouling, water purification and other devices.
Closed system:
It is a closed system in which an antifreeze is injected into a closed plastic pipe buried deep underground, and energy is exchanged with water or soil through a heat exchanger. Closed systems are not affected by factors such as groundwater level and water quality.
1. Vertical buried pipe - deep soil
The vertical buried pipe can obtain the heat of the deep underground soil. The vertical buried pipe is usually installed at a depth of 50-150 meters underground. One or more sets of pipes are connected to the heat pump unit. The antifreeze in the closed plastic pipe transfers the heat energy to the heat pump, which is then converted into the heating required by the building. Hot water. The vertical buried pipe is the main mode of the ground source heat pump system and is strongly supported by the government departments of various countries.
2, horizontal buried pipe - the surface of the earth is placed horizontally 2 meters deep in the plastic pipe, the plastic pipe is filled with anti-freezing liquid, and connected to the heat pump. The horizontal buried pipe covers a large area, the earthwork excavation volume is large, and the underground heat exchanger is affected by the surface climate change.
3. Surface water
The waters of rivers, rivers, lakes, and seas, as well as deep wells, are called surface waters. The ground source heat pump can extract heat or cold from the surface water to achieve the purpose of heating or cooling. The heat pump system using surface water has low cost and high operating efficiency, but is limited by geographical location (such as rivers and lakes) and national policies (such as taking deep well water).
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